JP2009115044A - Air compressor including modified valve device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To avoid a situation that a valve device does not appropriately close an air hole of a piston due to failure of the valve device caused by metal fatigue. <P>SOLUTION: An air compressor includes a cylinder housing 12, the piston 30 slidably received in the cylinder housing 12, and a motor 50 connected to the piston 30 and moving the piston 30 reciprocatingly to the cylinder housing 12 for generating pressurized air. Since the valve device 60 includes one side fixed on the piston 30 and another side of the valve device 60 regulates movement in relation to the piston 30 to prevent excessive bend in relation to one side of the valve device 60 or the piston 30, a regulating device can be used. The regulating device is an ear positioned at an upper part of the valve device 60 and regulates its bend or movement to the piston 30 with engaging with another side of the valve device 60. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an air compressor, and more particularly to an air compressor having an improved valve device that effectively controls the flow of air through or into and out of a cylinder housing.

  A general air compressor is a cylinder housing that is attached to or fixed to a base, and has a piston housing that is slidably disposed therein, and a cylinder housing that is fixed to the base. And a motor coupled to the piston of the cylinder housing to actuate or drive the piston in a reciprocating motion.

  Applicants have developed various types of common air compressors (Chou Patent Document 1 and Chou Patent Document 2), each of which is a piston slidably disposed within a cylinder housing. And a spring blade having one end fixed to the piston and the other end selectively closing the air hole of the piston for controlling the flow of air through the piston.

  Typically, the spring blade is made of an elastic metal or steel material that opens the piston air hole, and air flows through the piston at the same time that the piston air hole is partially opened by the spring blade. To be able to do so, it may be pressed against the piston to bend.

However, during use, the spring blade must be bent or deformed frequently with respect to one end of the spring blade, and therefore may fatigue and fail after use, so that the spring blade is bent or deformed. When this happens, the air hole of the piston may not be properly closed.
US Pat. No. 6,200,110 US Pat. No. 6,280,163

  The present invention has been made to alleviate and / or avoid the above disadvantages of conventional air compressors.

  It is a primary object of the present invention to provide an air compressor having an improved valve device that effectively controls the flow of air through the valve device or into and out of the cylinder housing.

  Further objects and advantages of the present invention will become apparent from a careful reading of the detailed description provided below, with appropriate reference to the accompanying drawings.

  Referring initially to the drawings, FIGS. 1 and 2, an air compressor according to the present invention is provided with a support base 10 having a plate 11, and is provided on or extends from the plate 11, preferably integrally formed with the plate 11. The cylinder housing 12 is provided. The cylinder housing 12 has a chamber 13 formed therein and having a chamber 13 (FIG. 2) for slidably receiving the piston 30 therein, and for purposes of heat dissipation, etc. It has one or more fins 14 (FIG. 1) that extend laterally or radially outward. The piston 30 has an extension or piston rod 31 extending therefrom and is slidable in a reciprocating motion within the chamber 13 of the cylinder housing 12 to generate pressurized air.

  The cylinder housing 12 is an outlet pipe 15 extending upward or outward from an upper portion thereof, and is a section communicating with the chamber 13 of the cylinder housing 12 for receiving pressurized air from the chamber 13 of the cylinder housing 12. It has an outlet pipe 15 having a chamber 16 formed therein. A spring check valve 17 (FIGS. 2 and 3) may be disposed in the outlet pipe 15 and engaged with a valve seat 18 formed or provided between the outlet pipe 15 and the cylinder housing 12. . In order to release the pressurized air when the air pressure in the cylinder housing 12 and the outlet pipe 15 is **, a relief valve or a safety valve (not shown) may be further provided and attached to the outlet pipe 15.

  Thus, the spring check valve 17 is used to restrict the pressurized air from flowing only from the chamber 13 of the cylinder housing 12 into the compartment 16 of the outlet pipe 15, It is also possible to prevent backflow from the compartment 16 into the chamber 13 of the cylinder housing 12. In order to close or seal the compartment 16 of the outlet pipe 15 and to stably hold the spring check valve 17 in the compartment 16 of the outlet pipe 15, the cap 19 is screwed into the outlet pipe 15 or the like. You may attach to 15 outer ends, ie, free ends.

  The cylinder housing 12 includes one or more ducts that extend outwardly from the outlet pipe 15 and communicate with the compartment 16 of the outlet pipe 15 for receiving pressurized air from the compartment 16 of the outlet pipe 15. 20, 21, 22, and 23 are further provided. The ducts 20, 21, 22, 23 may be coupled to various types of equipment that require a supply of pressurized air. To release pressurized air when the air pressure in the cylinder housing 12 and / or the outlet pipe 15 exceeds a predetermined pressure, thereby preventing over-pressurization and breakage of the cylinder housing 12 and / or the outlet pipe 15 For example, a relief valve 24 may be provided and attached to one of the ducts 20.

  In order to detect and indicate the air pressure in the cylinder housing 12 and / or the outlet pipe 15, a pressure gauge 25 may be provided and attached to another duct 21. A nozzle 26 is provided and attached to another duct 22 so that pressurized air is supplied from the chamber 13 of the cylinder housing 12 and the compartment 16 of the outlet pipe 15 to various facilities that require the supply of pressurized air. You may be able to do it.

  By providing or extending ducts 20, 21, 22, 23 to or from outlet pipe 15, relief valve 24 and pressure gauge 25 and nozzle 26 are connected to the outlet pipe without the use of additional or special coupling members or tools. Note that it can be easily and easily attached to or coupled to duct 15 with ducts 20, 21, 22, 23. One or more lids (not shown) are further provided to selectively seal or close the ducts 20, 21, 22, 23 when the ducts 20, 21, 22, 23 need not be used. It may be attached or fixed to any of the ducts 20, 21, 22, 23 by screwing engagement or the like.

  A gear 40 is rotatably mounted to the lower portion of the plate 11 with one or more bearings (not shown) and a shaft 41 and is defined therein by a space 43 defined by a peripheral casing 44. And it has the space 43 which receives and fixes the eccentric member 45 (FIG. 1, FIG. 2) in the inside. The eccentric member 45 may be fixed to the gear 40 by a fastener (not shown) or the like, and thus may rotate together with the gear 40 and operate the piston 30, i.e., relative to the cylinder housing 12. In order to move the piston 30 in a reciprocating motion, a crank or eccentric pin 47 extending from the eccentric member and coupled to the piston rod 31 of the piston 30 is provided.

  The motor 50 may be attached or fixed to the upper portion 15 of the plate 11 with fasteners (not shown) or the like, which has a spindle 52 (FIG. 2) extending through the plate 11, and The pinion 53 is fixed to the spindle 52 and meshed with the gear 40, whereby the gear 40 is rotated or driven by the motor 50 through the pinion 53, so that the piston 30 is driven by the eccentric member 45 and the eccentric pin 47. It can be actuated, i.e. moved reciprocally relative to the cylinder housing 12. A fan device 54 may be further provided and coupled to the motor 50 to be rotated or driven by the motor 50 to generate circulating or ventilated air.

  As shown in FIG. 2, the piston 30 is operated by the motor 50 via the pinion 53, the gear 40, the eccentric member 45, and the eccentric pin 47, that is, moves in a reciprocating manner with respect to the cylinder housing 12. Thereby generating pressurized air that can flow into the outlet tube 15 and then out through any or all of the ducts 20, 21, 22, 23, and thus the cylinder The air pressure in the housing 12 and / or the outlet pipe 15 can be detected and indicated by a pressure gauge 25, pressurized air can be supplied by a nozzle 26 to equipment requiring a supply of pressurized air, and When the cylinder housing 12 and / or the outlet pipe 15 are over-pressurized, the pressurized air can be released via the relief valve 24.

  As shown in FIGS. 3 to 5, the piston 30 is preferably attached to an outer peripheral portion of the piston 30 and slidably engages with the cylinder housing 12, whereby an airtight seal is provided between the piston 30 and the cylinder housing 12. A seal ring 32 is provided, and an air passage 33 is formed inside the piston. The spring blade or valve device 60 has one side or first side 61 attached or fixed to one side or first side 34 of the piston 30, and the biasing of the air passage 33 of the piston 30 and It is suitable for performing occlusion and has elasticity suitable for controlling the flow of air through the air passage 33 of the piston 30. The above structure is general and will not be described in further detail.

  One side or the first side 61 of the valve device 60 may be fixed to one side or the first side 34 of the piston 30 with one or more fasteners 62, and the valve device 60 is a bending characteristic of the valve device 60. Or to further increase elasticity, it further has a notch 63 (FIG. 3) formed on one side or the first side 61 thereof, and also at a position opposite to the notch 63 of the valve device 60, i.e. distally therefrom. And has an opening 64 formed in the second side 65 of the valve device 60. The valve device 60 is formed of an elastic metal or steel material, and closes and selectively opens the air passage 33 of the piston 30, and the air passage 33 of the piston 30 is partially opened by a spring blade or the valve device 60. At the same time, it may be forced to bend against the piston 30 so that air can flow through the piston 30.

  The piston 30 has a ridge 35 extending upwardly from the first side 34 of the piston 30 to engage and position and / or clamp the valve device 60, and the valve device 60 The projections 36 (FIGS. 3 and 6) extend from the ridges 35 to engage the notches 63 and to further position or clamp the valve device 60 with respect to the piston 30. The piston 30 further includes a restricting means or device 37 that extends upward from the second side 38 of the piston 30 and is opposite the ridge 35, and preferably the air passage 33 of the piston 30 has a ridge. 35 and configured to be formed and positioned between the restricting means or device 37. The restriction device 37 extends through the opening 64 of the valve device 60 (FIG. 5).

  The restriction device 37 has an extension or ear 39 extending therefrom, the ear extending or facing away from the ridge 35, preferably parallel to the upper surface of the piston 30 and of the valve device 60. Located above the second side 65, thereby engaging the second side 65 of the valve device 60, thus allowing the second side 65 of the valve device 60 to bend or move relative to the piston 30. Restricting the second side 65 of the valve device 60 to prevent excessive bending or deformation relative to the first side 61 of the valve device 60.

  Alternatively, the restriction device 37 may be located outside the valve device 60 without entering the opening 64 of the valve device 60, and the extension or ear 39 also extends inwardly of the valve device 60. Out and located above the second side 65 of the valve device 60, thereby engaging the second side 65 of the valve device 60, so that the second side 65 of the valve device 60 bends or moves relative to the piston 30. To prevent the second side 65 of the valve device 60 from being excessively bent or deformed with respect to the first side 61 of the valve device 60.

  The valve device 60 further includes an inner arc slot 66 formed therein, whereby an outer peripheral blade component or first blade component 67 and an inner spring blade or second blade component 68 within the valve device. And the inner arc slot 66 can be positioned between the first blade component 67 and the second blade component 68. In order to bias and block the air passage 33 of the piston 30 and to control the flow of air through the air passage 33 of the piston 30, the inner or second blade component 68 is provided with the air passage 33 of the piston 30. Has a larger area.

  Alternatively, as shown in FIG. 7, the piston 30 has one or more pegs or fastening members or rivets or catches 341 extending upward from one or first side 61 of the piston. The valve device 60 may also have one side or first side 61 provided with one or more holes 611 for receiving the pegs or fastening members or rivets or catches 341 of the piston 30. Good.

  The valve device 60 further comprises one or more, for example two coupling components 69 formed or provided in the other side or the second side 65, which comprise the first blade component 67 and the first blade component 67. Coupled between the two blade components 68 to couple the first blade component 67 and the second blade component 68 together and increase the resiliency or travel of the second blade component 68. Alternatively, as shown in FIG. 6, the valve device 60 includes an inner arc slot formed therein, an outer peripheral blade component or first blade component and an inner spring blade or second formed therein. There may be no blade components and the valve device 60 may also be used to close and selectively open the air passage 33 of the piston 30.

  To explain the operation, as shown in FIG. 5, the first blade component 67 or the other side or the second side 65 of the valve device 60 may be moved away from the upper surface of the piston 30 or may be repelled. Alternatively, the second blade component 68 of the valve device 60 may be further moved or repelled away from the first blade component 67 of the valve device 60 so that the piston 30 is appropriate and selected In order to effectively engage and releasably and selectively close the air passage 33 of the piston 30 and to effectively control the flow of air through the air passage 33 of the piston 30. The 60 second blade components 68 may have better mobility or elasticity to move or spring away from the top surface of the piston 30.

  Accordingly, the air compressor according to the present invention has an improved valve device that effectively controls the flow of air through the valve device or into and out of the cylinder housing.

1 is a partially exploded view of an air compressor according to the present invention. FIG. 2 is a partial cross-sectional view of the air compressor taken along line 2-2 of FIG. 1 with a piston assembled in the air compressor. It is a partial exploded view which shows the piston and valve member of an air compressor. FIG. 4 is a partial cross-sectional view taken along line 4-4 of FIG. FIG. 5 is a partial cross-sectional view taken along line 5-5 of FIG. FIG. 4 is a partially exploded view similar to FIG. 3, showing another structure of the piston and valve member of the air compressor. It is a partial exploded view which shows the piston and valve member of the air compressor of another embodiment.

Explanation of symbols

12 Cylinder housing 15 Outlet pipe 30 Piston 31 Piston rod 33 Air passage 37 Limiting device 39 Ear 50 Motor 60 Valve device 61 First side 65 Second side

Claims (6)

A support base (10) having a plate (11);
A cylinder housing (12) provided on the plate of the support base, having a chamber (13) formed therein, and added from the chamber (13) of the cylinder housing (12). A cylinder housing (12) having an outlet pipe (15) formed therein with a compartment communicating with the chamber (13) of the cylinder housing (12) for receiving pressurized air;
A piston (30) slidably accommodated in the chamber (13) of the cylinder housing (12), having a piston rod (31) coupled to the piston (30), and an air passage formed therein. A piston (30) having a first side (34) and a second side (38);
A motor (50) attached to the plate (11) of the support base (10) to move the piston (30) in a reciprocating motion with respect to the cylinder housing (12) to generate pressurized air. When,
A valve device having a first side (61) fixed to the first side (34) of the piston (30) and having a second side (65) opposite to the first side (61). 60)
The second side (65) of the valve device (60) is restricted from moving relative to the piston (30), and the second side (65) of the valve device (60) 60) means (37) for restricting excessive bending with respect to said first side (61).   The restricting means (37) has a restricting device (37) extending from the piston (30), and the restricting device (37) extends from the second side of the valve device (60) ( The air compressor of claim 1, further comprising an ear (39) positioned above 65).   The valve device (60) has an opening (65) formed in the second side (65) thereof and has an inner arcuate slot (66) formed therein, whereby A first blade component (67) and a second blade component (68) are formed, and the inner arc slot (66) is between the first blade component (67) and the second blade component (68). The restriction device (37) extends through the opening (65) of the valve device (60), and the ear (39) of the restriction device (37) Positioned above the second side (65) of the valve device (60), the second side (65) of the valve device (60) bends or moves relative to the piston (30). The air compressor according to claim 1, wherein the air compressor is limited.   The valve device (60) has at least one fastener (62) that secures the first side (61) of the valve device (60) to the first side (34) of the piston (30), The air compressor according to claim 1.   In order to attach the valve device (60) to the first side (34) of the piston (30), the valve device (60) is formed on the first side (34) of the valve device (60). The piston (30) extends upward from the first side (34) and extends on the first side (34) of the valve device (60). The air compressor of claim 1, wherein the air compressor has at least one catch.   The piston (30) has a ridge (35) extending upward from the piston (30) for engaging with the valve device (60) and fastening the valve device (30), and the valve device (60). ) Further has a notch (63) formed in the first side (61) thereof, so that the piston (30) engages the notch (63) of the valve device (60). The air compressor according to claim 1, further comprising a protrusion (36) extending from the ridge (35).

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